多尺度建模揭示了7q11.23拷贝数变异依赖于核糖体生物发生和神经元成熟和刺激性的变化
Marija Mihailovich1,2, Pierre-Luc Germain1,3, Reinald Shyti1,2
1European Institute of Oncology (IEO) IRCCS, Milan, Italy.
The Journal of clinical investigation
|July 15, 2024
概括
在7q11.23的副本数变化导致威廉姆斯-比伦综合征 (WBS) 和7q微复制综合征 (7Dup). 这项研究揭示了在这些神经发育障碍中对神经元功能和mTOR通路调节的剂量依赖的相反影响.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 在7q11.23的拷贝数变异 (CNV) 会导致威廉姆斯-比伦综合征 (WBS) 和7q微重复综合征 (7Dup),这两种都是神经发育障碍 (NDD).
- 了解CNV剂量如何影响这些NDD中的基因表达层和细胞功能至关重要,但仍然具有挑战性.
研究的目的:
- 为了研究由7q11.23 CNV剂量影响的神经元分化和兴奋力的对称相反的动态.
- 探索基因表达,翻译和蛋白质水平在WBS和7Dup的不同分子层之间的相互作用.
主要方法:
- 综合转录组学,转录组学和蛋白质组学分析在患者衍生和同位素诱导的神经元上进行.
- 对基因表达,蛋白质酸化 (p-RPS6,p-4EBP) 和核糖体基因活性进行定量分析.
主要成果:
- 神经元传播的基因显示了剂量依赖的转录变化,而翻译和核糖体基因则被转录后缓冲.
- 酸化RPS6 (p-RPS6) 在WBS下调,在7Dup上调;p-4EBP显示了相反的变化,表明剂量特定的mTOR途径失调.
- 确定了p-RPS6和p-4EBP在神经发生过程中的独特作用,突出了它们在NDD中的机械相关性.
结论:
- 跨分子和功能层的多尺度建模对于理解WBS和7Dup等NDD至关重要.
- 核糖体生物发生在这对NDD中起着显著的病理生理作用.
- 在神经发育障碍中,p-RPS6和p-4EBP作为机械可操作的继电器,在神经发生过程中发挥着不同的作用.
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